Quiz next week and practice HW

On the quiz:

1.  Energy:  Potential (mgh) and kinetic (0.5 mv^2).  How to calculate these and use the conservation of energy principle.

2.  Period of pendulum formula use

3.  Parts and properties of a wave

Quiz dates:

A:  2/15
E:  2/16

A draft of the lab will be due the class AFTER the quiz.

Practice problems:

Consider a 5-m long pendulum:

1.  What is the period of this pendulum?
2.  What is the frequency of oscillation of this pendulum?
3.  Where in its swing does it have maximum PE?
4.  Where does it have maximum KE?
5.  Where are the PE and KE equal?
6.  Where is the speed greatest?

Imagine that this pendulum has a 4-kg ball and it is lifted to a point 2-m above the lowest point in the swing.

7.  How much PE does it have at this location?
8.  How much KE will it have at the lowest point in the swing?
9.  What will the speed be at the lowest point in the swing?

Wave question

10.  Consider a string that is 0.5-m long.  If its n=3 harmonic has a frequency of 15 Hz, what is the wavelength and speed of this wave?